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LibGL: Centralize all context parameters

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The `glGet*` family of functions requires that all parameters of
different types are transparently converted into each other. For
example, you can request a boolean parameter as a float or a list of
double values as an integer. It might be considered bad practice to
request parameters through the wrongly-typed function, but to be spec-
compliant we need to implement this.

Introduce a new `::get_context_parameter()` to obtain a parameter
value, which is then converted to the right type by the respective
`::gl_get_*()` functions.
This commit is contained in:
Jelle Raaijmakers 2021-12-01 22:06:27 +01:00 • committed by Andreas Kling
parent 2af9b625e8
commit b1ac181537
3 changed files with 153 additions and 82 deletions
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2
Userland/Libraries/LibGL/GL/gl.h
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@ -161,6 +161,7 @@ extern "C" {
#define GL_3_BYTES 0x1408
#define GL_4_BYTES 0x1409
#define GL_DOUBLE 0x140A
#define GL_BOOL 0x8B56
// Format enums
#define GL_COLOR_INDEX 0x1900
@ -343,6 +344,7 @@ extern "C" {
// OpenGL State & GLGet
#define GL_MODELVIEW_MATRIX 0x0BA6
#define GL_PROJECTION_MATRIX 0x0BA7
//
// OpenGL typedefs